I am curious where in general you live. Tea generally needs certain environments. I think the place you live can’t be too cold. For instance I live in New York. I don’t think tea plants would survive our average winters. It may be pointless for you to buy tea plants if you live in a cold climate.

Odd that I just posted a link about tea growing this morning and then see this. It’s not the whole story but a good summary of some basic factors from a really authoritative source: https://tealet.com/usteaplanting